302 INSECTA SAUNDERSIANA. 
approaches ; lower cross-vein curved inward near the base: alule yellowish 
white with pale yellow borders: halteres luteous. Length of the body 
2$ lines; of the wings 5 lines. 
South America. 
TACHINA TENEBRIFERA, Mas. 
Atra; caput auratum, antice album; thorax cinereus, nigro subvittatus ; 
abdomen cano-micans ; ale cinerea, basi et ad costam nigricantes. 
Deep black: head with a gilded covering, clothed beneath with white 
hairs ; face and hind part white ; frontalia deep black, linear ; facialia 
without hairs except at the base; epistoma yellow, not prominent: eyes 
bare : palpi tawny: feelers black; third joint linear, reaching the epi- 
stoma, about thrice the length of the second; sixth slender, minutely 
pubescent, very much longer than the third: chest with a gray covering, 
which is indistinctly striped with black ; abdomen long-obconical, with 
hoary reflections on each side, a little longer than the chest: wings gray, 
blackish at the base and along the fore border ; prebrachial vein forming a 
very obtuse angle at its flexure, from whence it is almost straight; lower 
eross-vein with the two curves, the lower one very deep: alule pale tawny. 
Length of the body 3% lines ; of the wings 7 lines. 
Brazil. 
Tacutna scrra, Mas, 
Aurata ; thorax nigro quadrivittatus ; abdomen nigrum, segmentis albido 
fasciatis, subtus ferrugineum ; antenna et pedes nigra; ale sub- 
cineree. 
Black: head and chest with a gilded covering : head clothed behind 
and beneath with pale yellow hairs; frontalia deep black, slightly widening 
from the eyelets to the feelers; facialia without bristles except at the base; 
epistoma not prominent: eyes bare: palpi tawny: feelers black; third 
joint linear, not reaching the epistoma, full thrice the length of the 
second ; sixth slender, very indistinctly pubescent, almost twice the length 
of the third: chest with four black stripes : abdomen obconical, not longer 
than the chest, with a broad whitish band on the fore border of each segment ; 
